Storms are set to sweep across Cambridgeshire tomorrow as police urge people not to go jump in a lake.

Forecasters have issued a severe weather warning for the region and temperatures will soar to as high as 32C today.

Humid air is expected to become increasingly unstable tonight leading to thundery downpours throughout Saturday, according to the Met Office.

And Cambridgeshire police have now issued a warning to sun seekers and families.

A spokesman said: “In this hot weather we would advise people to resist the temptation of leaving their windows open while out and about this weekend. An open window could be an invitation to an unwanted intruder.

“We would also urge people to not going swimming in lakes or rivers, especially not to jump in from bridges. It may look a great way to cool down, but you do not know what dangers lie beneath the surface.